Are the Stop Gain settings reversed when the gyro is mounted upside down? Are they reversed if the direction is changed from "Normal" to "Reverse"?

Clockwise and counter clockwise refer to the direction of rotation when the gyro's label is facing towards the main rotor. If you mount the gyro with its label facing towards the skids then the two stop gain adjustments will be swapped.

The gyro direction reversing does not affect the affect the stop gain adjustments.